弹出窗口-android

样式：project/app/res/main/values/arrys.xml
----------------

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="sex">
    <item>男</item>
    <item>女</item>
    </string-array>
#单选
    <string-array name="city">
        <item>北京</item>
        <item>上海</item>
        <item>广州</item>
        <item>深圳</item>
        <item>重庆</item>
        <item>无锡</item>
        <item>南京</item>
        <item>哈尔滨</item>
        <item>北京</item>
        <item>上海</item>
    </string-array>
#多选
 </resources>

src/main/java/com.example....../MainActitvity.java
-----------------------

package com.example.administrator.myapplication;

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button button=findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);
                builder.setIcon(R.mipmap.ic_launcher)
                        .setIcon("注意")
//                            .setMessage("确定要退出吗？")
                        .setSingleChoiceItems(R.array.sex, 1, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                               if (which==0) {
                                   Toast.makeText(MainActivity.this, "你已经选择了男", Toast.LENGTH_SHORT).show();
                               }else {
                                   Toast.makeText(MainActivity.this, "你已经选择了女", Toast.LENGTH_SHORT).show();

                            }
                        }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        builder.create().dismiss();
                    }
                }).setNegativeButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        builder.create().dismiss();
                    }
                });
                builder.create().show();

            }
        });
    }
}